CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 5,320	$ 3,005	$ 2,762
NET INCOME		5,378	2,912	2,752
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization		2,357	3,077	2,831
Nuclear fuel and other amortization		272	300	372
Impairment charges		446	7	2
Unrealized losses (gains) on marked to market derivative contracts - net		436	(44)	(337)
Foreign currency transaction losses (gains)		(25)	13	0
Deferred income taxes		(875)	1,230	1,162
Cost recovery clauses and franchise fees		82	94	176
Acquisition of purchased power agreement		(243)	0	(521)
Benefits associated with differential membership interests - net		(460)	(309)	(216)
Gains on disposal of a business, assets and investments - net		(1,225)	(490)	(89)
Recoverable storm-related costs		(108)	(223)	0
Other - net		90	(111)	49
Changes in operating assets and liabilities:
Current assets		(353)	(162)	66
Noncurrent assets		(60)	(58)	(109)
Current liabilities		766	(24)	64
Noncurrent liabilities		(7)	(12)	(123)
Net cash provided by operating activities		6,413	6,293	6,089
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures of FPL		(5,174)	(3,776)	(3,428)
Independent power and other investments of NEER		(5,295)	(5,396)	(4,505)
Cash grants under the American Recovery and Reinvestment Act of 2009		78	335	8
Nuclear fuel purchases		(197)	(283)	(361)
Other capital expenditures and other investments		(74)	(181)	(83)
Proceeds from sale of the fiber-optic telecommunications business		1,454	0	0
Sale of independent power and other investments of NEER		178	658	52
Proceeds from sale or maturity of securities in special use funds and other investments		3,207	3,776	4,851
Purchases of securities in special use funds and other investments		(3,244)	(3,829)	(4,982)
Proceeds from sales of noncontrolling interests in NEP		0	645	345
Other - net		149	5	107
Net cash used in investing activities		(8,918)	(8,046)	(7,996)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt		8,354	5,657	5,772
Retirements of long-term debt		(6,780)	(3,310)	(3,972)
Proceeds from differential membership investors		1,414	1,859	761
Net change in commercial paper		1,419	(106)	(768)
Proceeds from other short-term debt		450	500	1,225
Repayments of other short-term debt		(2)	(662)	(813)
Issuances of common stock - net		55	537	1,298
Proceeds from issuance of NEP convertible preferred units - net		548	0	0
Dividends on common stock		(1,845)	(1,612)	(1,385)
Dividends to NEE		0	0	0
Other - net		(680)	(363)	(221)
Net cash provided by (used in) financing activities		2,933	2,500	1,897
Effects of currency translation on cash, cash equivalents and restricted cash		26	10	17
Net increase in cash, cash equivalents and restricted cash		454	757	7
Cash, cash equivalents and restricted cash at beginning of year		1,529	772	765
Cash, cash equivalents and restricted cash at end of year		1,983	1,529	772
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest (net of amount capitalized)		1,184	1,193	1,143
Cash paid for income taxes - net		142	91	33
SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued property additions		3,029	3,626	2,616
Assumption of debt/acquisition hold-backs in connection with Texas pipeline acquisition		0	0	1,078
Decrease (Increase) in property, plant and equipment - net as a result of cash grants primarily under the American Recovery and Reinvestment Act of 2009		(154)	419	224
Increase in property, plant and equipment - net as a result of a settlement/noncash exchange		(108)	(72)	(45)
Proceeds from differential membership investors used to reduce debt		0	100	0
FPL[Member]
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	[1]	1,880	1,727	1,648
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization		933	1,651	1,576
Nuclear fuel and other amortization		157	218	209
Deferred income taxes		905	932	504
Cost recovery clauses and franchise fees		82	94	176
Acquisition of purchased power agreement		(243)	0	(521)
Recoverable storm-related costs		(108)	(223)	0
Other - net		(139)	42	(56)
Changes in operating assets and liabilities:
Current assets		(190)	25	(90)
Noncurrent assets		(37)	(31)	(53)
Current liabilities		701	16	40
Noncurrent liabilities		(32)	(86)	(41)
Net cash provided by operating activities		3,909	4,365	3,392
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures of FPL		(5,174)	(3,776)	(3,428)
Nuclear fuel purchases		(117)	(158)	(205)
Proceeds from sale or maturity of securities in special use funds and other investments		1,986	2,495	3,731
Purchases of securities in special use funds and other investments		(2,082)	(2,506)	(3,792)
Other - net		18	28	55
Net cash used in investing activities		(5,369)	(3,917)	(3,639)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuances of long-term debt		1,961	309	1,084
Retirements of long-term debt		(882)	(262)	(551)
Net change in commercial paper		1,419	212	(1,086)
Proceeds from other short-term debt		450	500	100
Repayments of other short-term debt		(2)	(450)	0
Capital contributions from NEE		0	600	1,454
Dividends on common stock		(1,450)	(1,300)	(700)
Other - net		(15)	(2)	(8)
Net cash provided by (used in) financing activities		1,481	(393)	293
Net increase in cash, cash equivalents and restricted cash		21	55	46
Cash, cash equivalents and restricted cash at beginning of year		153	98	52
Cash, cash equivalents and restricted cash at end of year		174	153	98
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest (net of amount capitalized)		472	434	435
Cash paid for income taxes - net		2	147	439
SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued property additions		668	664	474
Increase in property, plant and equipment - net as a result of a settlement/noncash exchange		$ (112)	$ 0	$ 0

[1] FPL's comprehensive income is the same as reported net income